Spring-fork for bicycles.



E. LAMPEL.

SPRING FQRK FOB BIGYGLES.

APPLICATION FILED MAB-5.1909.

937,614. Patnted ()qt.19,1909

Pl/Ma. w G m/Wm;

UNTTED STATES PATENT OFFICE.

ERNST LAMPEL, OF DRESDEN, GERMANY.

SPRING-FORK FOR BIGYCLES.

Application filed March 5, 1909.

To all whom it may concern:

Be it known that I, ERNST LAMIEL, a subject of the German Emperor, residing at 67 l/Viirzburgerstrasse, in the city of Dresden, Saxony, Germany, have invented a new and useful Improvement in Spring-Forks for Bicycles, of which the following is a specification.

The present invention relates to spring forks for bicycles and consists in providing the hollow ends of the fork arms with slidable, spring actuated cores adapted to receive the wheel axle; the different parts being arranged so as not to impair the stability of the machine, nor to materially alter its appearance or increase its weight.

In the annexed drawings the invention is illustrated, Figure 1 representing a partial section through one leg of the rear fork, Fig. 2, a section along line A-B of Fig. 1, Fig. 3, a partial section through one leg of the front fork, and Fig. 4:, a section along line CD of Fig. 3.

The invention consists in the arrangement of so-called buffer springs, i. 6., spirally wound blade springs, on the forks immediately above the wheel axles.

As shown in the drawings, the ends of the forks a are provided with slidable cores I) having slots 0 in which bolts and c, secured to the fork, are guided. By this arrange- Specifioation of Letters Patent.

Patented Oct. 19, 1909.

SerialNo. 481,547.

ment, which serves to limit the play of the springs, the stability of the machine remains unimpaired. The springs h are placed between the wheel axle at g and the ends of the fork a and abut with their upper, broad, ends against caps z and with their lower ends against washers 7c. The tension of the springs should be regulated so that said springs only commence to play under the ordinary load of the machine.

I claim:

A spring fork for bicycles comprising, in combination with an ordinary fork with hollow arms, slidable cores fitted in the ends of said arms, projecting through the latter, being adapted to receive the wheel axle at their lower ends and being provided on the part which is interior of the fork arm with elongated slots, bolts fitted in said slots and secured to the fork arms so as to limit the movements of the cores in the latter, and spirally wound blade springs arranged 011 the projecting ends of the cores between caps and washers and abutting by means of the former against the ends of the fork arms and by means of the latter against the wheel axle, substantially as set forth.

ERNST LAMPEL.

Witnesses HARRY A. MCBRIDE, J. KANs. 

